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Foreign Credit Facilities (Narrative) (Details) - Foreign Credit Facilities [Member] - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Line of Credit Facility [Line Items]    
Line of credit facility, amount outstanding $ 127.1 $ 53.2
Foreign Credit Facilities, Remaining Borrowing Capacity $ 78.2 $ 159.7